If the vent is going to blow out it'll have to take the lock with it because the pan covers part of the vent.
I've seen the results of this happening, The liner let go and took the lock right off the side of the gun. Shattered the lock area as the lock bolts were pulled thru the gun. The result of a massive over load od powder and in combination with a massive over indulgence of alchohol. Sort of a "watch this" sort of thing. :shake:
I've also watched a fellow pry his powder drum from his CVA rifle out of the support post of the firing line. He also removed his drom every time he cleaned his rifle.
Just some food for thought, I'll stick to non removable vent liners. :v